Men spared being in this political party (6)
I believe the answer is:
labour
'men spared being in this political party' is the definition.
'labour' can be an answer for 'political party' (I've seen this before). I'm unsure of the remainder of the definition.
'being in this political party' is the wordplay.
'being' becomes 'abo' (Abo is an example).
'in' means one lot of letters goes inside another.
'this political party' becomes 'lur' (I am not sure about this - if you are sure you should believe this answer much more).
'abo' going into 'lur' is 'LABOUR'.
Can you help me to learn more?
(Other definitions for labour that I've seen before include "Workers" , "Productive work" , "opposition" , "Donkey-work" , "What mothers have been through" .)